在算法的领域，效率不仅仅是速度的衡量，更是对问题本质的深刻陈述。

A 1% improvement in efficiency could mean the difference between life and death.

Hope is a scarce resource in poor communities.

你对别人越感兴趣，别人就对你越感兴趣。要想变得有趣，先有兴趣。